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Connection pc obligatoire? — Parallax Forums

Connection pc obligatoire?

TedoursTedours Posts: 5
edited 2012-02-02 18:22 in BASIC Stamp
Bonjour,

Tout d'abord, veuiller me pardonner mais je ne parle pas l'anglais.
Je suis en r
bsx
bsx
Ampli_board_2.bsx
6K

Comments

  • TedoursTedours Posts: 5
    edited 2012-01-31 03:54
    Hello,

    First of all, please forgive me but I do not speak English.
    I am conducting a class A amplifier
    The power this with a soft start and a temperature monitoring.

    The program works the way I want ... when the stamp is connected to the pc.

    Can you tell me if I did something wrong?

    Ampli_board_2.bsx

    Thank you in advance!

    PS: You can answer in English ...

    Ted
  • PJAllenPJAllen Banned Posts: 5,065
    edited 2012-01-31 04:57
    The program works the way I want ... when the stamp is connected to the pc.
    Does that mean that it doesn't work when disconnected from the PC?

    What are you working with, a USB BoE, a serial BoE, or...?

    Speculating -- it may be that you are missing a ground (common) that the Stamp picks up when connected to the PC.

    Perhaps you could sketch out your set-up on a sheet of paper, take a picture of that, and post it.
  • TedoursTedours Posts: 5
    edited 2012-01-31 05:08
    The stamp is completely inactive when the PC is unplugged.

    I use a USB serial converter parallax

    Attached is the wiring diagram

    http://pvellvehi.free.fr/Presentation/Sboard1a.JPG

    Thank you for your answer
  • PJAllenPJAllen Banned Posts: 5,065
    edited 2012-01-31 11:00
    The resolution of that drawing leaves much to be desired. I can't tell if you are trying to run it from "9V" at V_in or if you are supplying 5V to V_dd.
    From Stamp 'physical' pin 4 (Vss) to pin 24 = ____V?
    From Stamp 'physical' pin 4 (Vss) to pin 21 = ____V?

    Is all of that on one circuit board or is it on a bunch of breadboards and so on?
    [I think you're losing a ground connection when you disconnect it from the PC.]

    If you can make all of that then you should be able to troubleshoot it.
    There's nothing to prevent the Stamp from running but absence of power (5V).
  • TedoursTedours Posts: 5
    edited 2012-01-31 13:14
    [QUOTE=PJ Allen;
    From Stamp 'physical' pin 4 (Vss) to pin 24 = 5 V
    From Stamp 'physical' pin 4 (Vss) to pin 21 = 5 V[/QUOTE]

    Obviously make sure it works ... uh ....

    I do not understand ...

    Well I'll try that way.

    Anyway, thank you very much for your answers
  • PJAllenPJAllen Banned Posts: 5,065
    edited 2012-01-31 16:24
    I cannot read any of the details in the schematic you provided.

    With regard to my post / #5:
    Is there 5V for the Stamp at the Stamp?
    Not measured from some presumed "ground", but right on its pins.
  • TedoursTedours Posts: 5
    edited 2012-01-31 21:35
    Hello,

    sorry for the schema, I did not notice ...

    http://pvellvehi.free.fr/Presentation/Sboard1b.JPG

    You put me doubt, whether I have a measure in the right place ... I re-measurement tonight!
  • PJAllenPJAllen Banned Posts: 5,065
    edited 2012-02-01 06:32
    I can see clearly, now!

    The output of your 7805 (+5V), U4, is going to the Stamp's "V_in" pin#24. It (5V) should go to the Stamp's pin#21.

    5V isn't enough for V_in, that should be in the range of +8 to 12V.
  • PJAllenPJAllen Banned Posts: 5,065
    edited 2012-02-02 18:22
    Any news, Ted?
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